package com.yhsimon.facade;

/**
 * @author： YHSimon
 * @date： 2021-09-03 17:00
 */
public class Projector {
    private Projector() {

    }

    private final static Projector instance = new Projector();

    public static Projector getInstance() {
        return instance;
    }

    public void on() {
        System.out.println("projector on");
    }

    public void off() {
        System.out.println("projector off");
    }

    public void project() {
        System.out.println("projector is projecting ");
    }

    public void focus() {
        System.out.println("projector focus ");
    }
}
